Improvement in sewing-machines



DA. PORTER 80 G. W. BAKER.

SEWING-MACHINE. No.174,703. I PatentedvMarchl, 1876.

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UNITED STATES PATENT OFFICE DARGY PORTER AND GEORGE W. BAKER, OFCLEVELAND, OHIO.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 174,703, dated March14, 1876; application filed February 1, 1876.

To all whom it may concern.-

Be it known that we, DAROY PORTER and GEORGE W. BAKER, of Cleveland, inthe county of Guyahoga and State of Ohio, have invented certain new anduseful Improvementsin Sewing-Machines; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accompanying drawings, whichform part of this specification Our inventionrelates to an improvementin sewing-machines.

In the drawings, Figure l is a front elevation of our said improvementas adapted to sewing-machines Fig. 2, a side elevation of the same. v

Our invention consists in the following parts and combinations, ashereinafter specified and claimed, wherein A is the main shaft of asewing-machine, upon which is usually placed the governing and beltwheel A. B is an cecentric placed upon the main shaft A for operatin gthe connecting-arm G C; said connecting-arm is pivoted at 0 to the elbowor angle piece D D. At or near the extremity of the portion 0 of theconnecting-arm is provided a lug, or its equivalent, 0, which operatesin and serves to revolve the slotted disk 0 of the feed-shaft G. Theangle-piece D D is pivoted to the frame of the machine at 01; its arm Dis pivoted to the connectingarm G O at 0, while its arm D is suitablyconnected to the sh Little-arm E in such a manner as to impart to thesaid arm its reciprocating motion.

Operation: The connecting-armO 0 through the agency of the eccentric B,imparts an oscillating movement to the arm D. This swinging arm D, andits connection with the crank or slotted disk 0 or its equivalent,imparts a rotary motion to the feed-shaft G equal to that of the mainshaft A, though in an opposite direction thereto, while at the sametime, by its connection 0, the arm 0 O imparts an oscillating motion tothe elbow or angle piece D D, which is rigidly pivoted at its angle tothe frame of the machine. The opposite end of the elbow, being connectedwith the shuttle-arm E, imparts a reciprocating motion to the saidshuttle-arm.

What we claim is- 1. In combination with connectingrod O C, the elbow orangular lever D D and the shuttle-arm E, whereby a reciprocating motionis imparted to the said shuttle-arm, substantially asshown.

2. In combination with the main shaft A, feed-shaft G, and shuttle-armE, the connecting-bar 0 G and elbow or angular piece D D, substantiallyas shown, whereby the rotary motion of the main shaft A imparts an equaland opposite rotary motion to the feed-shaft G, and a reciprocatingmotion to the shuttlearm E, substantially as and for the purpose shown.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses. I

DAROY PORTER. GEORGE W. BAKER. Witnesses:

FRANCIS ToUMEY, JAMES P. WALSH.

